Symmetric Two-User Gaussian Interference Channel with Common Messages
Information Theory
2014-01-22 v1 math.IT
Abstract
We consider symmetric two-user Gaussian interference channel with common messages. We derive an upper bound on the sum capacity, and show that the upper bound is tight in the low interference regime, where the optimal transmission scheme is to send no common messages and each receiver treats interference as noise. Our result shows that although the availability of common messages provides a cooperation opportunity for transmitters, in the low interference regime the presence of common messages does not help increase the sum capacity.
Cite
@article{arxiv.1401.5092,
title = {Symmetric Two-User Gaussian Interference Channel with Common Messages},
author = {Quan Geng and Tie Liu},
journal= {arXiv preprint arXiv:1401.5092},
year = {2014}
}
Comments
13 pages, 1 figure